The rolling bearing rings and rolling elements, on one side repeatedly withstand the high contact pressure, on the other side accompanying the sliding rolling contact. The cage on one side contact with the rings and rolling bodies on both sides, and a party to the sliding, on the other side of the tension and compression forces. Therefore, the bearing rings, rolling element and cage materials, performance, and the main requirements are as follows.
Rings, the performance of rolling material requirements:
Rolling fatigue strength, high hardness, high abrasion consumption;
Ring and rolling element materials:
Rings and rolling usually use high carbon chromium bearing steel. Most of the bearings use of SUJ2 JIS steel. Large bearing use of SUJ3. The SUJ2 the chemical composition, in the world, as bearing materials have been normalized. For example: AISL52100 (United States), DIN100Cr6 (West Germany), BS535A99 (United Kingdom), are the same kinds of steel. Further need for impact-resistant case, use as a bearing material chrome steel, chrome molybdenum steel, nickel chromium molybdenum steel, hardening of the infiltration of carbon to make steel, hardened layer from the surface to the appropriate depth. Proper hardening depth, meticulous organization, appropriate hardness of the surface and core hardness of the infiltration of carbon bearings, with excellent impact resistance than bearing steel bearing.
The NSK implementation of the vacuum degassing treatment, the materials used in clean high oxygen content of less good quality. And then using the appropriate heat treatment, and significantly improve the rolling fatigue life of bearings.
Addition to the above-mentioned steel, according to the special purpose, but also excellent heat resistance, high-speed steel, good corrosion resistance of stainless steel.
Cage materials required by the performance:
Good dimensional stability, mechanical strength; In addition, you also need good workability. According to different purposes, is required impact resistance, heat resistance, and good corrosion resistance.
Cage material:
Stamping cage material, the use of low carbon steel. According to different purposes, but also the use of yellow copper, stainless steel plate. Cutting cage material, use high strength brass, carbon steel, in addition to the use of synthetic resin.



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